489975665 has 4 divisors (see below), whose sum is σ = 587970804. Its totient is φ = 391980528.

The previous prime is 489975653. The next prime is 489975697. The reversal of 489975665 is 566579984.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 187772209 + 302203456 = 13703^2 + 17384^2 .

It is a cyclic number.

It is not a de Polignac number, because 489975665 - 2¹⁶ = 489910129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48997562 + ... + 48997571.

It is an arithmetic number, because the mean of its divisors is an integer number (146992701).

Almost surely, 2^489975665 is an apocalyptic number.

It is an amenable number.

489975665 is a deficient number, since it is larger than the sum of its proper divisors (97995139).

489975665 is an equidigital number, since it uses as much as digits as its factorization.

489975665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97995138.

The product of its digits is 16329600, while the sum is 59.

The square root of 489975665 is about 22135.3939427334. The cubic root of 489975665 is about 788.3604650268.

The spelling of 489975665 in words is "four hundred eighty-nine million, nine hundred seventy-five thousand, six hundred sixty-five".